<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>TreeNode UI</title>
    <style>
      /* 简单的样式 */
      .tree-node {
        display: flex;
        align-items: center;
        cursor: pointer;
      }
      .indent {
        width: 16px;
        height: 16px;
        margin-right: 4px;
      }
      .switcher,
      .checkbox {
        width: 16px;
        height: 16px;
        margin-right: 4px;
      }
      .content {
        user-select: none;
      }
      .highlight {
        background-color: yellow;
      }
    </style>
  </head>
  <body>
    <div id="treeContainer"></div>

    <script src="treeNode.js"></script>
  </body>
</html>
